Masterpiece Classic at 6 pm Sunday presents part one of Downton Abbey, Series III. The Great War is over and the long-awaited engagement of Lady Mary and Matthew is on, but all is not tranquil at Downton Abbey as wrenching social changes, romantic intrigues, and personal crises grip the majestic English country estate.

Masterpiece Classic at 8 pm Sunday and 8 pm Saturday presents the part two of Downton Abbey, Series III. The fate of Downton Abbey hinges on a letter from a dead man, while Edith and Sir Anthony face their own fateful moment.

DCI Banks and DS Annie Cabbot are called to investigate an arson attack that caused two narrow boats to go up in flames on DCI Banks at 9 pm Sunday and 9 pm Thursday.

Independent Lens at 9 pm Monday presents “Soul Food Junkies,” a film that puts the culinary tradition of soul food under the microscope to examine both its benefits and consequences.

Pioneers of Television at 7 pm Tuesday profiles the first standup comediennes to appear on television, covers television’s most enduring variety star and features interviews with contemporary actresses in “Funny Ladies.”

Part two of Abolitionists: American Experience at 8 pm Tuesday focuses on the deepening divide between the North and South, touching off a crisis that is about to careen out of control.

Frontline at 9 pm Tuesday takes a probing look at the first four years of Obama’s presidency and examines his key decisions and the experiences that will inform his second term in “Inside Obama’s Presidency.”

Take to the skies with psychedelic rock band Royal Forest as they lead Hardly Sound at 10:30 pm Tuesday on an epic adventure.

Nature at 7 pm Wednesday examines the day-to-day dramas of an extended family of koalas, seen through the eyes of the scientists studying their every move and vocalization on “Cracking The Koala Code.”

In a race against developers in the Rockies, archaeologists uncover a unique site packed with astonishingly preserved bones of mammoths, mastodons and other giant extinct beasts, opening a vivid window on the vanished world of the Ice Age on NOVA at 8 pm Wednesday.

Life on Fire at 9 pm Wednesday explores the fish escaping the Earth’s wrath to give birth to descendants that continue their pioneering journey to the heart of an active volcano in “The Surprise Salmon.”

David Maraniss, Pulitzer Prize winning author and journalist, discusses his career on Overheard with Evan Smith at 7 pm Thursday.

Arts in Context at 7:30 pm Thursday grants viewers an all-access pass to Fantastic Fest, the largest genre film festival in the U.S., to give a glimpse at horror, fantasy, sci-fi, action and just plain fantastic movies from around the world.

Mind of a Chef at 8 pm Thursday explores deceptively simple dishes around the world with David Chang ranging from Chicken Yakitori to high-end sushi.

The Daytripper at 8:30 pm Thursday follows Chet to Bay Area Houston to visit NASA, eat a hoagie and fried shrimp, go birding on Armand Bayou, and visit the Kemah Boardwalk.

Discover how fungi, like mushrooms, slime mold, and lichens, benefit the garden on Central Texas Gardener at noon Saturda. On tour, visit a garden geared for wildlife all year long.

Jazz and pop cross on Austin City Limits at 7 pm Saturday with Norah Jones and Kat Edmonson.